16505316 has 48 divisors (see below), whose sum is σ = 43449280. Its totient is φ = 5417280.

The previous prime is 16505303. The next prime is 16505323. The reversal of 16505316 is 61350561.

It is a happy number.

16505316 is a `hidden beast` number, since 1 + 650 + 5 + 3 + 1 + 6 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a self number, because there is not a number n which added to its sum of digits gives 16505316.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6096 + ... + 8376.

Almost surely, 2^16505316 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 16505316, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21724640).

16505316 is an abundant number, since it is smaller than the sum of its proper divisors (26943964).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

16505316 is a wasteful number, since it uses less digits than its factorization.

16505316 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2361 (or 2353 counting only the distinct ones).

The product of its (nonzero) digits is 2700, while the sum is 27.

The square root of 16505316 is about 4062.6735039872. The cubic root of 16505316 is about 254.6095061293.

Adding to 16505316 its reverse (61350561), we get a palindrome (77855877).

The spelling of 16505316 in words is "sixteen million, five hundred five thousand, three hundred sixteen".